I have a tax nightmare, a master's in accounting, and I still can't figure it out.?

Ok, I was a full time graduate student from January to July of this year. I graduated in May but took an extra course to be eligible to sit for the CPA exam. I'm an auditor though, so that's why this tax issue is eluding me :). I'm 21, and will not turn 22 until January of 2009. I did work while I was in school, and I have a full time job now. However, I did not provide over half of my support while I was in school. I plan on getting married in two weeks (December 15, 2008). My mom still wants to claim me for 2008. If I file married filing separately (as would be appropriate), can my mother still claim me as a dependent? Help!